+static inline
+void ctx_get_struct_size(struct lttng_ctx *ctx, size_t *ctx_len,
+ enum app_ctx_mode mode)
+{
+ int i;
+ size_t offset = 0;
+
+ if (caa_likely(!ctx)) {
+ *ctx_len = 0;
+ return;
+ }
+ for (i = 0; i < ctx->nr_fields; i++) {
+ if (mode == APP_CTX_ENABLED) {
+ offset += ctx->fields[i].get_size(&ctx->fields[i], offset);
+ } else {
+ if (lttng_context_is_app(ctx->fields[i].event_field.name)) {
+ /*
+ * Before UST 2.8, we cannot use the
+ * application context, because we
+ * cannot trust that the handler used
+ * for get_size is the same used for
+ * ctx_record, which would result in
+ * corrupted traces when tracing
+ * concurrently with application context
+ * register/unregister.
+ */
+ offset += lttng_ust_dummy_get_size(&ctx->fields[i], offset);
+ } else {
+ offset += ctx->fields[i].get_size(&ctx->fields[i], offset);
+ }
+ }
+ }
+ *ctx_len = offset;
+}
+